title: An electrically tunable optical zoom system using two composite liquid crystal lenses with a large zoom ratio.
abstract: An electrically tunable-focusing optical zoom system using two composite LC lenses with a large zoom ratio is demonstrated. The optical principle is investigated. To enhance the electrically tunable focusing range of the negative lens power of the LC lens for a large zoom ratio, we adopted two composite LC lenses. Each composite LC lens consists of a sub-LC lens and a planar polymeric lens. The zoom ratio of the optical zooming system reaches ~7.9:1 and the object can be zoomed in or zoomed out continuously at the objective distance of infinity to 10 cm. The potential applications are cell phones, cameras, telescope and pico projectors.
authors.affiliation: Department of Photonics, National Chiao Tung University, Hsinchu, Taiwan. yilin@mail.nctu.edu.tw
authors.forename: Yi-Hsin
authors.initials: YH
authors.lastname: Lin
authors.forename: Ming-Syuan
authors.initials: MS
authors.lastname: Chen
authors.forename: Hung-Chun
authors.initials: HC
authors.lastname: Lin
mesh_terms: D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D050866:Liquid Crystals / Q000737:chemistry*